BirdAnalyst
BBS Route · Texas · BCR 21

Ola Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 96 species recorded across 54 survey years, still active.

96Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
54Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2025Span
9Observers

Bird Species Found on Texas Ola

Top 40 of 96 species by most recent count. Each links to its species trend.

Species recorded on the Ola route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Northern CardinalCardinalidae382025-32%1969
Northern MockingbirdMimidae282025-59%1969
European StarlingSturnidae252025+213%1969
Black VultureCathartidae25202511×1989
Cliff SwallowHirundinidae222025+533%1997
Barn SwallowHirundinidae182025-5%1970
Turkey VultureCathartidae152025+173%1970
American CrowCorvidae152025-67%1969
Scissor-tailed FlycatcherTyrannidae122025-87%1969
House SparrowPasseridae122025-79%1969
Eastern BluebirdTurdidae122025+110%1969
Blue JayCorvidae112025+100%1969
Mourning DoveColumbidae102025-82%1969
Eurasian Collared-DoveColumbidae102025+317%2006
Red-bellied WoodpeckerPicidae82025-21%1969
Carolina WrenTroglodytidae72025+83%1972
Downy WoodpeckerPicidae62025+171%1973
Brown-headed CowbirdIcteridae62025-78%1969
Painted BuntingCardinalidae62025+19%1969
Western Cattle-EgretArdeidae62025+38%1970
Great Blue HeronArdeidae62025+38%1974
Red-tailed HawkAccipitridae52025+43%1970
Grasshopper SparrowPasserellidae52014+150%1983
Chimney SwiftApodidae42025-77%1969
Eastern MeadowlarkIcteridae42025-95%1969
Lark SparrowPasserellidae42025-90%1969
Carolina ChickadeeParidae42025+73%1969
Eastern PhoebeTyrannidae42025+83%1971
Little Blue HeronArdeidae32023-64%1969
Yellow-billed CuckooCuculidae32025-79%1969
Red-winged BlackbirdIcteridae32025-95%1969
Great-tailed GrackleIcteridae32022-45%1969
DickcisselCardinalidae32025-91%1969
Tufted TitmouseParidae32025-55%1970
Purple MartinHirundinidae32025+367%1972
Rock PigeonColumbidae22021+122%1974
Crested CaracaraFalconidae22025-14%1999
Common NighthawkCaprimulgidae22012-92%1969
Bell's VireoVireonidae21968-33%1967
Orchard OrioleIcteridae22011+0%1970

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.